The treatment of ticks on tortoises using amitraz.

Amitraz at a concentration of 2 ml litre-1 of water successfully induced detachment of Amblyomma marmoreum and Amblyomma hebraeum ticks from the mountain tortoise, Geochelone pardalis. Detached ticks died without reattaching. At the strength used, amitraz had no apparent adverse effects on the tortoises.